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Case Closure Summary Page 2 <br /> Leaking Underground Fuel Storage Tank Program <br /> III. Release and Site Characterization Information (continued) <br /> Maximum Documented Contaminant Concentrations -- Before and After Cleanup <br /> Contaminant Soil Before (ppm) Water (ppm) Contaminant Soil Before (ppm) Water (ppm) <br /> After Before After After Before After <br /> TPH (Gas) 4,880 0.3 <.05 <.05 Xylenes 188 0.017 <.0005 0.0023 <br /> TPH(Diesel) NA NA NA NA Ethylbenzene 33.9 0.047 <.0005 <.0005 <br /> Benzene 2.77 0.005 0.0006 <.0005 Oil&Grease NA NA NA NA <br /> Toluene 32.1 0.011 <.0005 <.0005 Heavy Metals 0.46 NA NA NA <br /> MTBE NA <.5 NA 0.0023 <br /> Comments: ACTIVE REMEDIATION NOT PERFORMED AT THIS SITE. 'BEFORE' SOIL CONCENTRATIONS FROM <br /> TANK PULL RESULTS; 'AFTER' SOIL CONCENTRATIONS FROM SOIL BORING SB-3, EXCEPT MTBE FROM 12197 <br /> AND 10102 SOIL BORINGS. WATER 'BEFORE' CONCENTRATIONS FROM 08/15/89 QUARTERLY WELL SAMPLING; <br /> WATER 'AFTER' CONCENTRATIONS FROM 11/26/03 QUARTERLY WELL SAMPLING. <br /> IV. Closure <br /> Does completed corrective action protect existing beneficial uses per the Regional Board Basin Plan?YES <br /> Does completed corrective action protect potential beneficial uses per the Regional Board Basin Plan? YES <br /> Does corrective action protect public health for current land use? YES <br /> Site management requirements: NONE <br /> Should corrective action be reviewed if land use changes?YES <br /> Monitoring/Vapor wells decommissioned: 3 Number Decommissioned: 3 Number retained: 0 <br /> List enforcement actions taken: NOR <br /> List enforcement actions rescinded: NONE <br /> V. Local Agency Representative Data <br /> Name: DONNA HERRN, REH5 Title: DIRECTOR, ENVIRONMENTAL HEALTH DEPT, <br /> Signature: Date: <br /> tt'h-11�� <br /> VI. Central Valley Regional Water Quality Control Board (RB) Notification <br /> Date Submitted to RB: 03/18/04 Response Date: 05/21/04 <br /> RB Staff: JAMES L.L. BARTON Response: CONCURRENCE <br /> Title: ENGINEERING GEOLOGIST <br /> VII. Additional Comments, Data, etc. <br /> This document and the related CASE CLOSURE LETTER, Shall be retained by the lead agency as part of the official <br /> site file. <br />